Brake assembly for motor vehicles



Patented Apr. 30, 1940 y PATENT OFFICE l 2,199,199 BRAKE ASSEMBLY FOB MOTOR. VEHICLES f wuusm: New rm, N. r., ...im er one-half to Harry N. Rhino, New-York, N. Y.

Application September 3l. 1933, Serial No. 230,933 l 2 Chim. (a. 18S-24B) This invention relates to new and useful improvements in an automobile or the like `brake assembly.n

An object of this invention is to produce a brake assembly for all types of vehicles which may be readily separated or dismantled without removing the whole unit.- y

The invention proposes to so construct the brake assembly that the brake 4shoes may be removed irom the brake arms by the removal of suitable screws arranged upon face portions of the brake shoes. y

It is proposed to mount the brake shoes directly over the brake arm so that the direction of 1| the brake action is in a direct straight line. This will. prevent application of the brake shoes at undesirable angular inclinations.

Still further the invention proposes a novel way of securing the brake drum to the hub flange u of the wheel. It is proposed to characterize the novel construction by the provision of several fingers or lugs mounted upon the flange and cooperative with openings on the brake drum for properly aligning and centralizing these parts and for producing a balanced relationship of the parts. r

For further comprehension of the invention, and of. the objects and advantages thereof, reference will be had to the following description u and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. i is a perspective view ot the brake assembly constructed according to this invention.

Fig. 2 is a vertical sectional view of the device shown in Fig. 1.

Fig. 3 is a front elevational view of the brake a assembly with the brake drum removed.

Fig. 4 is a perspective view of one of. the brake shoes. f

lig. 5 is a perspective view of.one of the brake- Fig. 9 is another sectional view taken on the line O-l of Fig. 4'1. l

Fig. l0 is a fragmentary perspective view. ill lustratin'g another modincation.

The brake assembly, according to this invention, may be used in connection with all types of vehicles and devices propelled by power, and includes a wheel hubiiange Il having several` axially extending fingers or lugs il, one of. which, 5 namely the lug il', is larger than the others. A brake drum I2 hasan annular end portion i2* formed with openings forreceiving the lugs or fingers il land il'. Fastening elements i3 are provided for removably securing the said annular 10 end portion and the flange, Il together.

A pair of brake arms il is suitably hung at one of theirfends i4* upon a stationary member Ii by pintle elements il, Said arms are cooperative with thebrake drum. A means is il provided for expanding the brake arms. In the particular form of the device shown on the drawing the expanding means is of the hydraulic type and'includes a hydraulic cylinder il interposed between the free ends oi the brake arms. Brake go shoes -I'I for supporting brake linings which are adaptedto b e engaged against thel brake drum are removably mounted upon the brake arms il.

The wheel hub flange is provided with a hub portion il suitably mounted upon a wheel axle gg I3. The lugs Il and Il' are formed upon or mounted upon peripheral portions of the hub ange I0. The brake drum I2 has a skirt portion i2 against which the brake shoes engage. The brake drum also is provided with the annular so end portion i2n which extends over an edge portion of the wheel hub flange il. It is these overlapping portions which are. connected together by the lugs Il and Il' and by screws I3. These screws are arranged alternately between the lugs. 35

The screws i3 serve to hold the wheel hub flange i0 and the annular member IZ together against possible axial displacement. Of course, the screws also hold these parts together against f radial displacement. The lugs il working in the,

openings formed in the annular end portion Il* serve to hold these parts together under radial stresses. An advantage of this construction resides in the fact that radial stresses are not directly imparted to the screws il. In fact the parts maybe so constructed that very little, if any, radial stresses are transmitted to the holdingscrews.,

Each brake arm Il is provided with a comparatively narrow arcuate central portion il. so At one end of the central portion il there is the end portion il'L previously referred to. This end portion is comparatively thick-as may be understoodbyexaminingFigsZand, and servesto hold the brake arm suitably distanced from the ll stationary member l5. At the other end of the edge central portion Hb the brake arm is provided with a comparatively wide end llc. stems Hd are provided at the ends it of each brake -arm Il, which engage the usual uid actuated pistons I6' in the hydraulic cylinder i6. Each brake shoe l1 is substantially of T-shape in transverse cross section. There is an outer transverse portion l1* upon the outer face of which the brake liningl is mounted. There isv also a ange portion llb representing the stem portion of the T-shape.

The ilange portion i1 is adapted to engage upon the outer edge of the arcuate central portion Hb of the brake arm. It should be noted (see Fig. 6) that these parts are not side by side, but one above the other. Therefore there will be no tendency for angular motion of the brake arms during the braking action. The ends of. the 4flanges I'Ib are formed with reduced lugs HN which are adapted toengage in face recesses 2li formed in the faces of the end portions lla and Hc of the brake arms. Screws 21| are used for holding the end portions i'lbb flxedly to the end portions oi the brake arms. The details of the construction of the hydraulic expanding cylinder will not be given in this specification since -it forms'no part of. the invention.

The operation of the device is as follows:

: When required the brake drum I2 may be easily removed from the brake assembly merely by taking out the screws I3. This is an advantage over prior constructions in which these parts were riveted together. With the new construction the brake arms and brake shoes-are readily accessible.

When the brake drum l2 is removed the remaining portion of the brake assembly appears as shown in Fig. 3. When required the brake shoes l1 may easily be removed from the brake arms I4 merely by removing the screws 2|. When these screws are removed the parts readily separate. The brake shoes may be relined very easily after they are removed.

'I'he purpose of forming the lug il' and its receiving opening. of a diierent size 4than the lugs Il and their receiving openings is that it will then be required that the brake drum be assembled in a certain relationship with the wheel hub flange. This relationship would be one in which the parts are properly balanced. 'I'he balancing is done during the manufacture. The partys must be assembled in this relationship.

In Figs. 7 and 8 a modification of the invention has been disclosed characterized by another means for securing the brake shoes upon the brake arms. According to this form of the invention each brakearm i4 is formed from a pair of adjacent lateral sections secured together by several screws 23. These screws pass through openings in one of the sections and threadedly engage 'the other of the sections. An internal arcuate groove 24 is formed inwards from the adaisance jacent edges of these lateral sections. This grove is shown circular in transverse cross section.

` Each brake shoe I1' is of T-shape in transverse cross section, the head portion o! which is adapted to receive the brake lining, while the stem portion is provided with an enlarged bead 25 adapted to engage the groove 24. One of thel sections A further feature of the construction resides in Y the fact that each of the :brake shoes I1' may be circumferentially adjusted, that-is, moved toditferent circumferential positions upon the brake In order toA arm and be secured in the new position by the l tightening of the screws 23 and 2l.

In other respects this form of the invention is similar to the previous form and similar parts may be identified by corresponding reference numerals.

In Fig.. the recess 20 is illustrated with i branch recesses to better distribute the strain.

While I have illustrated and described the prev ferred embodiments of my invention, it is to be understood that I do not limit Ymyself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as ydefined f 1. In an automobile brake assembly, brake arms suitably hung at one of their ends, means for expanding said brake arms, and brake shoes `ior brake linings removably mounted on said arms, each of said brake arms being formed of lateral sections secured together, an internal arcuate groove -Iormed inwards from the ends of said sections, and the brake shoes' having stem portions withv beaded ends for engaging tightly in said grooves..

2. In an automobile brake assembly, bralrev arms suitably hung at one of their ends, means for expanding said brake arms, and brake shoes for brake linings removably mounted on said arms, each of said brake arms being formed of lateral sections secured together, an internal ar-i cuate groove formed inwards from the ends of4 said sections, and the brake shoes having stem portions with beaded ends for engaging tightly in said grooves, and fastening elements for assisting in securing the lateral sections of the:

brake arms together.

WILLIAM GODSTREY. 

